Apparatus for burning fuel in furnaces.



No. 854,798. PATBNTED MAY 28, 1907. E. M. BUNGE. I APPARATUS FOR BURNING FUEL IN FURNACES.

APPLICATION FILED IEB. 2, 1907.

Witnuoea No. 854,798. PATENTBD MAY 28, 1907.

v E. M. BUNGE."

APPARATUS POR' BURNING PUBLIN FURNACES.

APPLICATION FILED FEB. 2, 1907.

2 8HEBTB-8HEBT 2.

IIIII. k uuuuuuuuuuuuuu .ments ln-Apparatus for Burning Fuel in Fur- EARL M. BUNOE, OF FENTON, MICHIGAN.

APPARATUS FOR BURNING FUEL m FURNACES.

Specification of Letters Patent.

Patented May 28,1907.

\Applioation filed February 2, 1907. Serial No- 355,444.

To all whom it may concern:

'Be it known that I, EARL M. BUNOE, a citizen of the United States residing at Fenton, 1n the county of 'Genesee and State of Michigan, have invented new anduseful Improvenaces, of which the following 1s ,a' specifica- .tion.

The object of my invention is the provision of an apparatus or means for burnin fuel in sus ension, such as pulverized coai when mixe with air, in a furnace, and' especially in rotary kilns, whereby relatively complete combustion may be secured bythoroughly the fuel with the air, and.

whereby when the apparatus is used in connection with a rotary or other kiln for burning Portland cement clinker the. flame and the intensity of the heat may be localized at various oints or places inwardly from the extreme ower end of the kiln, and said flame also be directed toward any portion of the internal surface of the kiln as well as axially thereof.

The invention consists incert'ain novelties of construction and combinations of parts hereinafter set forth and claimed.

The accompanying drawings illustrate an example of the physical embodiment of the Invention constructed and arranged according to one of the several most desirable modes I have so far devised for the practical application of the principle,

Figure 1 is a side view in elevation of the apparatus showing its use 1n connection with a rotary kiln. Fig. 2 is a top lan view of Fig.1. Fig. 3 is an enlar ed en view. Fig. is an enlarged sectiona view on line 00-90 Referring to the several figures, the numeral 1 designates the lower portion or end of a rotary kiln which may be of any well known construction and be su orted and revolved in any suitable way we nown in the art; 2, a housing or hood ofa well known type supported upon wheels and having an opening upon one vertical side which in this instance receives or matches the tubular end of the rotary kiln; 3, two openings in the rear wall of the hood and extendin throu h the fire brick, indicated by dotted ines in igs. 1 and ends located within the openings; 5, the face plate of the hood; 6, the main blast pipe connected with a blower and source of fuel su ply; 7, 7, the two branches leading from t e main blast. pipe; 8, sections of pipe constituting continuations of the branches to the fuel: discharge pipes; 9, flexible hose connecting the sectionsof pipe with the'fuel d1scharge pipes, whereby universal jo1nts are provided for the fuel discharge PIPES} 10 a rod for supporting the end of the maln p pe and the branch p1pes;-- 11 a damper located withinthe main pipe at its junction with the branches; 12, the shaft to which the damper the main pipe; 15, a bolt passed through the. I

slot in the circle and the lever; 16, a winged nut on the bolt; 17, 17, two channel iron sections upon the face plate 5 of the hood occupying parallel horizontal positions; 18, 18, two metallic plates with their edges loosely engagingI the channels so they may be moved orizontally; 19, a central hole 111 each late; 20, vertically movable plates; 21, ho es in the plates 20 within which are loosely sup orted the fuel discharge plp es; 22, groove bars or bearings which confine and guide the edges of the plates 20, as shown; 23, perforated lugs at the edges of plates 20; 24, lugs 11 on lates 18 with threaded holes; 25, t ea ed shafts a hand wheels, the threads of the shafts engaging the threaded holes in the lugs upon the horizontally movable plates, and the ends of the shafts having rotary bearings in the lugs 23 upon the vertically movable plates; 26,

perforated lugs at the edges of the plates 18, r

18 as shown; 27, brackets with. threaded holes secured to the hood or housing; and' supplplng fuel, such as pulverized coal, to the mam last plpe 6 maybe employed and such blowers and means being well known in the art I have not illustrated or described the same. a

The mode of o eration is as follows: As-

suming the fuel d1; zharge pipes 4, 4, to be in the relative positions s own by Fig. 2 and powdered fuel mixed with air to be projected fromthe discharge pipes, the two currents or streams will meet at point or place A,

where the fuel and air will become thoroughly line BB, when the fuel and .air issue from the discharge pipes under like pressure. The fuel being ignited an intense heat is localized at the place'A and for some distance inwardly therefrom, the length of the flame and the air pressure.

depending upon the amount of fuel discharge By turning the damper 11 in the main blast pipe 6 so that more fuel andair under pressurewill be delivered from one of the discharge pipes than from the other, the flame will be shifted from the place A to a position at one side of a vertical plane passi through the line B-B. Obviously the ame can thus be shifted-from side to side of the internal surface of the kiln as occasion may demand.

To change the place A of the most intense heat to a position nearer the lower end of the kiln, as at O, the threaded shafts 28 are revolved, and; the plates 18, 18, with the discharge pipes 4, 4, moved toward each other so the air and fuel-Will be delivered and meet at the placeC. I

To localize the flame and most intense heat inwardly at any place on the line BB from the lower end of the kiln the free ends of the dischar e pi es 4, 4, are moved away from each ot er y the hand wheel mechanism and the currents or streams of air and fuel thus caused to meet at the desired place. When the discharge pi es 4, '4, coincide in directi on with the lines l D the place of most intense heat will be located far within the kiln at the meeting point or lace of the two streams or currents of air an fuel.

As previously explained in connection with place A, the flame may be shifted from side to side of the internal surface of the kiln from the point or lace wherever in the plane of the line BB t e two currents of fuel and air may be caused to unite or meet. By the manipulation of the hand wheels and shafts,

25, 25, the free ends of the discharge pipes maybe moved so that the common flame will be localized'at the top internal surface or bottom internal surface of the kiln, near the lower end of the kiln, as indicated by dotted lines E and F, Fig. 1, or it may be located at the top and bottom internal surfaces at'places some distance Within the kiln.

It will be observed that each discharge pipe 4 forms at the end where it connects with the hose 9 a universal joint, and that the opposite end is free to move. through practically the circumference of a circle so that the current of fuel and air may be di-' rected toward any portion of the internal surface of the kiln or axially thereof. Under some conditions it may be desirable 'to use a single discharge pipe thus connected at one end so as to form a universal joint,

.but two such pipes are preferably employed and the currents of fuel and air or flames united to form one current or flame, inasmuch as by bringing the currents of fuel and air together the same are more thoroughly mixed and more complete combustion with a greater heat results. -Again, by bringing the two flames or currents of air and fuel together at an angle the heat may be localized near the lower end of the kiln and in this and other locations there is less tendency for the flame and heat to swiftly pass through the kiln to the stack before the heat has been transmitted to the material under treatment.

In all cases the hole or holes or openings in the housing should be large enough to allow the pipe or pipes to discharge the air and fuel to the desired place within the kiln.

The advantages secured by the use of my improved apparatus in connection with burning raw materials into Portland cement clinker are obvious. With devices now in use the length of the clinkering zone is very limited and the raw material frequently passes to the zone without being thoroughly burned, under which circumstances the kiln must be stopped and the unburned material driven back. By the use of my apparatus the clinkering zone can be brought to the lower end of the kiln or the heat elsewhere localized and the flame directed upon the material not thoroughly burned. In fact, the point or zone of clinkering is under the control of the operator at all times. Furthermore, the formation of rings may be prevented or the same readily burned off when formed as the flame can be directed to any point within the lower potion of the kiln and the heat there intensified.

From the foregoing description taken in connection with the drawings, it is clear that I have produced an apparatus whereby a plurality of streams of fuel and air may be united and thoroughly commingled and more perfect combustion secured when said streams of fuel and air are ignited, and whereby the resultant flame may be moved from place to placewithin a furnace or rotary k ln,,. and the heat localized for any desired purpose.

While I have shown and described only one example of the apparatus or means whereby the prineiple is physically embodied,

I do not intend to limit the scope of the invention to such specific means, as equivalent means may be employed to perform the same vor analogous functions, for instance, a different type of flexible joint may be selected, the pipes 4 be curved, other means he usedto move the free ends of the dischar e pipes, either simultaneously or successive y to different positions in the arcs of circles,

.inga

meet at an an le at a and two main supply or blast ipes eachhavdamper be substitute What I claim is:

1. The combination with a furnace, of two fuel discharge pipes each jointed at one end and freely movable at the other end, means for supplying air and fuel'to the ipes, and means for su porting them in di erent positions so that he air and fuel discharged therefrom may be caused to successively plurality of points or places within the furnace.

2. The combination with a furnace, of two fuel discharge pi es each jointed at one end and freely mova le at the other end; means for sup lyin air and fuel to the pipes; and means or a justing the said pipes to different angular positions in a horlzontal plane so that the two streams of air and fuel may be caused to meet at different points or places within the furnace.

3. The combination with a furnace, of two fuel discharge pipes angularly dis osed each to the other; means for pivoting t e same so the free ends maymove; means for supplying fuel and air to the pipes; and means for adjusting the pipes vertically so the flame may bedirected upwardly or downwardly within the furnace. j

4. The combination with a furnace, of two fuel dischargepipes each jointed at one end and freely movable at the other end; means for sup lying air and fuel to the pipes; and means or ad usting the pipes both vertically and horizontally so the two streams of fuel and air delivered from the pipes may meet at a plurality of points or places within the furnace and form one stream.

5. The combination with a rotary or other a kiln, of two fuel discharge pipes each jointed to move in vertical and horizontal planes at the free end; means for adjusting the pipes to angular positions so the streams of air and fuel will meet, change their directions, become thoroughly commingled and form one stream; and means for supplying fuel and air to the same. v

6. The combination with a rotary or other kllIl, of two fuel discharge pipes each universally jointed at one end to another pipe and the other end freely movable, and said .pipes angularly disposed each to the other so the streams of fuel and air. will meet to form one stream; means for supplying air and fuel to the pipes; and means for delivering more fuel to one of the pipes than to the other. v

7. The combination with a rotary kiln, of two freely jointed and movable fuel discharge pi es angularly disposed each to the other so t e streams of air and fuel will unite,

for the main blast pipe with branches as herein illustrated.

change their directions, become thoroughly commingled so as to form one stream, means for supip ying air and fuel to the pi es; and means or ad usting the said pipes an holding them in relatively adjusted positions.

8. The combination with a rotary kiln, of

two fuel discharge pipes. each movable at one end in the wall of a hood or housing and flexibly united at the opposite end to a pipe;

stream to one side of the meeting place of the said two streams of air and fuel. 10. The combination with a rotary kiln of a housing having an opening, a plate with an opening sup orted so as to move horizontally relative tot e opening in the housing, an air and fuel supply pipe and a fuel-discharge pipe carried by said movable plate and umversallyjointed to the air and fuel supply fpipe at a point outside of and independent 0 said plate.

11. The combination with a kiln and a housing having an opening, of two lates, one

of said plates movable horizontal y and the other vertically; an air and fuel supply pipe and a fuel discharge-pi e. supported by one of said plates and unite by a universal joint to the air and fuel supply pipe. v

12. The combination with a kiln, of a housing provided with two openings, and two horizontally movable plates each having an 0 ening and suitably supported; two

movable lates each having an opening; two I horizonta ly movable plates each supportin one of the vertically movable plates; an two fuel discharge pipes located within the openings of the plates and movable with the same.

in presence of two witnesses.

' EARL M. BUNCE. Witnesses:

R. B. RENWIOK, JOHN HOWELL.

In testimony whereof I afiix my signature I v 

